Pioneer Southwest Energy Partners L.P. Files 2012 Form 10-K

  Pioneer Southwest Energy Partners L.P. Files 2012 Form 10-K

Business Wire

DALLAS -- March 15, 2013

Pioneer Southwest Energy Partners L.P. (“Pioneer Southwest”) (NYSE:PSE) today
announced it has filed with the U.S. Securities and Exchange Commission its
Annual Report on Form 10-K for the year ended December 31, 2012.

Pioneer Southwest’s 2012 Form 10-K can be viewed on the Partnership’s website
at www.pioneersouthwest.com by selecting “Investors” and then “SEC Filings.”

Upon written request, investors may receive free of charge a hard copy of the
Annual Report on Form 10-K (including complete audited financial statements).
Written requests should be directed to Pioneer Southwest Energy Partners L.P.
Investor Relations at 5205 N. O’Connor Blvd., Suite 200, Irving, Texas
75039-3746.

Pioneer Southwest is a Delaware limited partnership, headquartered in Dallas,
Texas, with current production and drilling operations in the Spraberry field
in West Texas.

Contact:

Pioneer Southwest Energy Partners L.P.
Investors
Frank Hopkins, 972-969-4065
or
Josh Jones, 972-969-5822
or
Media and Public Affairs
Susan Spratlen, 972-969-4018
or
Suzanne Hicks, 972-969-4020